William I, Count of Nassau-Dillenburg

William I "the Rich", Count of Nassau-Dillenburg (10 April 1487-6 October 1559) was Count of Nassau-Dillenburg from 1516 to 1559, succeeding John V of Nassau-Dillenburg and preceding John VI of Nassau-Dillenburg. William was a member of the House of Nassau, and he was the son of John V and Elisabeth of Hesse-Marburg, two German nobles. During his reign as Count of Nassau-Dillenburg, he acquired the moniker "the Rich" due to having fourteen children (not due to personal wealth), many of whom would go on to be prominent figures. He was the father of the Dutch heroes William the Silent, Louis of Nassau, Adolf of Nassau, and Henry of Nassau-Dillenburg, all of whom were killed while fighting for Dutch independence.